diff --git a/proprietary/wvm/WVMMediaSource.cpp b/proprietary/wvm/WVMMediaSource.cpp
index 4f8c1eb3..bec540a8 100644
--- a/proprietary/wvm/WVMMediaSource.cpp
+++ b/proprietary/wvm/WVMMediaSource.cpp
@@ -422,7 +422,13 @@ WVStatus WVMMediaSource::DecryptCallback(WVEsSelector esType, void* input, void*
 {
     //ALOGD("DecryptCallback(type=%d, in=%p, out=%p, len=%d, key=%d\n",
     //     (int)esType, input, output, length, key);
+
     WVMExtractorImpl *extractor = (WVMExtractorImpl *)obj;
+    if (!extractor) {
+        ALOGE("WVMMediaSource::DecryptCallback - no extractor!");
+        return WV_Status_Unknown;
+    }
+
     sp<WVMMediaSource> source;
     if (esType == WV_EsSelector_Video)
         source = extractor->getVideoSource();